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Simplifying (r + -6)(r + -2) = 0 Reorder the terms: (-6 + r)(r + -2) = 0 Reorder the terms: (-6 + r)(-2 + r) = 0 Multiply (-6 + r) * (-2 + r) (-6(-2 + r) + r(-2 + r)) = 0 ((-2 * -6 + r * -6) + r(-2 + r)) = 0 ((12 + -6r) + r(-2 + r)) = 0 (12 + -6r + (-2 * r + r * r)) = 0 (12 + -6r + (-2r + r2)) = 0 Combine like terms: -6r + -2r = -8r (12 + -8r + r2) = 0 Solving 12 + -8r + r2 = 0 Solving for variable 'r'. Factor a trinomial. (2 + -1r)(6 + -1r) = 0Subproblem 1
Set the factor '(2 + -1r)' equal to zero and attempt to solve: Simplifying 2 + -1r = 0 Solving 2 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1r = 0 + -2 -1r = 0 + -2 Combine like terms: 0 + -2 = -2 -1r = -2 Divide each side by '-1'. r = 2 Simplifying r = 2Subproblem 2
Set the factor '(6 + -1r)' equal to zero and attempt to solve: Simplifying 6 + -1r = 0 Solving 6 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1r = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1r = 0 + -6 -1r = 0 + -6 Combine like terms: 0 + -6 = -6 -1r = -6 Divide each side by '-1'. r = 6 Simplifying r = 6Solution
r = {2, 6}
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